switch two ASN1_STRING_data() to ASN1_STRING_get0_data()

and while here mark as const data.

This diff is actually from gilles@, in OpenSMTPD-portable bundled
libtls.

ok tb@, jsing@

1 files changed, 5 insertions, 5 deletions

diff --git a/src/lib/libtls/tls_verify.c b/src/lib/libtls/tls_verify.c
index 685146a4a9..fbbed7969c 100644
--- a/src/lib/libtls/tls_verify.c
+++ b/src/lib/libtls/tls_verify.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: tls_verify.c,v 1.21 2023/05/05 14:05:33 tb Exp $ */
+/* $OpenBSD: tls_verify.c,v 1.22 2023/05/10 13:48:54 op Exp $ */
 /*
  * Copyright (c) 2014 Jeremie Courreges-Anglas <jca@openbsd.org>
  *
@@ -126,12 +126,12 @@ tls_check_subject_altname(struct tls *ctx, X509 *cert, const char *name,
                         continue;
 
                 if (type == GEN_DNS) {
-                        unsigned char   *data;
+                        const unsigned char     *data;
                         int              format, len;
 
                         format = ASN1_STRING_type(altname->d.dNSName);
                         if (format == V_ASN1_IA5STRING) {
-                                data = ASN1_STRING_data(altname->d.dNSName);
+                                data = ASN1_STRING_get0_data(altname->d.dNSName);
                                 len = ASN1_STRING_length(altname->d.dNSName);
 
                                 if (len < 0 || (size_t)len != strlen(data)) {
@@ -171,11 +171,11 @@ tls_check_subject_altname(struct tls *ctx, X509 *cert, const char *name,
                         }
 
                 } else if (type == GEN_IPADD) {
-                        unsigned char   *data;
+                        const unsigned char     *data;
                         int              datalen;
 
                         datalen = ASN1_STRING_length(altname->d.iPAddress);
-                        data = ASN1_STRING_data(altname->d.iPAddress);
+                        data = ASN1_STRING_get0_data(altname->d.iPAddress);
 
                         if (datalen < 0) {
                                 tls_set_errorx(ctx,